Question

determine a raiz de cada equação a seguir ( resolva descobrindo o valor do termo x desconhecido ) , considerando U=Q
a) 9x-3x=-x+49
b) 2x=18
c)3x+2=2x-11
d)5x=-45
f)7.(x-1)=2.(3x+1)

Answer 1

a) 9x-3x=-x+49
6x+x=49
7x=49
x=49/7=7

b) 2x=18
x=18/2=9

c)3x+2=2x-11
3x-2x=-11-2
x= -13

d)5x=-45
x=-45/5= -9

f)7.(x-1)=2.(3x+1)
7x-7=6x+2
7x-6x=2+7
x=9